[GitHub] qiuchenjian opened a new pull request #3072: [CARBONDATA-3247] Support to select all columns when creating MV datamap

[GitBox <gi...@apache.org>]

qiuchenjian opened a new pull request #3072: [CARBONDATA-3247] Support to select all columns when creating MV datamap
URL: https://github.com/apache/carbondata/pull/3072
 
 
   [Problem]
   "create table all_table(name string, age int, height int) stored by 'carbondata'"
   "create datamap all_table_mv on table all_table using 'mv' as select avg(age),avg(height),name from all_table group by name"
   throw UnsupportedOperationException("MV is not supported for this query")
   
   [Cause]
   ColumnPruning rule will not generate Project LogicalPlan when select all columns, So carbon can't generate SELECT node when transforming LogicalPlan to ModularPlan, then it can't create mv datamap
   
   [Solution]
   Add a executor rule to change the logical plan to support this scene
   
   Be sure to do all of the following checklist to help us incorporate 
   your contribution quickly and easily:
   
    - [ ] Any interfaces changed?
    
    - [ ] Any backward compatibility impacted?
    
    - [ ] Document update required?
   
    - [ ] Testing done
           Add a new test case
          
    - [ ] For large changes, please consider breaking it into sub-tasks under an umbrella JIRA. 
   
   

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